v. t. [ imp. & p. p. Decollated; p. pr. & vb. n. Decollating. ] [ L. decollatus, p. p. of decollare to behead; de- + collum neck. ] To sever from the neck; to behead; to decapitate. [ 1913 Webster ]

The decollated head of St. John the Baptist. Burke. [ 1913 Webster ]

a. (Zool.) Decapitated; worn or cast off in the process of growth, as the apex of certain univalve shells. [ 1913 Webster ]